期刊
SCIENCE
卷 372, 期 6542, 页码 618-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abf5602
关键词
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资金
- Office of Naval Research [N00014-17-1-2232, N00014-20-1-2574]
- National Science Foundation (NSF) [1538893]
- NSF Center for Synthetic Organic Electrochemistry [2002158]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [2002158] Funding Source: National Science Foundation
The use of iodine-terminated self-assembled monolayer (I-SAM) in perovskite solar cells (PSCs) leads to increased adhesion toughness at the interface, improved power conversion efficiency, reduced hysteresis, and enhanced operational stability. This is attributed to a decrease in hydroxyl groups at the interface and higher interfacial toughness achieved with I-SAM treatment.
Iodine-terminated self-assembled monolayer (I-SAM) was used in perovskite solar cells (PSCs) to achieve a 50% increase of adhesion toughness at the interface between the electron transport layer (ETL) and the halide perovskite thin film to enhance mechanical reliability. Treatment with I-SAM also increased the power conversion efficiency from 20.2% to 21.4%, reduced hysteresis, and improved operational stability with a projected T80 (time to 80% initial efficiency retained) increasing from similar to 700 hours to 4000 hours under 1-sun illumination and with continuous maximum power point tracking. Operational stability-tested PSC without SAMs revealed extensive irreversible morphological degradation at the ETL/perovskite interface, including voids formation and delamination, whereas PSCs with I-SAM exhibited minimal damage accumulation. This difference was attributed to a combination of a decrease in hydroxyl groups at the interface and the higher interfacial toughness.
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